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Title: Efficient construction of mock catalogs for baryon acoustic oscillation surveys

Abstract

Precision measurements of the large scale structure of the Universe require large numbers of high fidelity mock catalogs to accurately assess, and account for, the presence of systematic effects. We introduce and test a scheme for generating mock catalogs rapidly using suitably derated N-body simulations. Our aim is to reproduce the large scale structure and the gross properties of dark matter halos with high accuracy, while sacrificing the details of the halo's internal structure. By adjusting global and local time-steps in an N-body code, we demonstrate that we recover halo masses to better than 0.5% and the power spectrum to better than 1% both in real and redshift space for k=1 hMpc -1, while requiring a factor of 4 less CPU time. We also calibrate the redshift spacing of outputs required to generate simulated light cones. We find that outputs separated by Δ z=0.05 allow us to interpolate particle positions and velocities to reproduce the real and redshift space power spectra to better than 1% (out to k=1 hMpc -1). We apply these ideas to generate a suite of simulations spanning a range of cosmologies, motivated by the Baryon Oscillation Spectroscopic Survey (BOSS) but broadly applicable to future large scalemore » structure surveys including eBOSS and DESI. As an initial demonstration of the utility of such simulations, we calibrate the shift in the baryonic acoustic oscillation peak position as a function of galaxy bias with higher precision than has been possible so far. This paper also serves to document the simulations, which we make publicly available.« less

Authors:
 [1];  [1];  [2];  [2];  [3]
  1. Yale Univ., New Haven, CT (United States). Dept. of Physics
  2. Argonne National Lab. (ANL), Argonne, IL (United States). High Energy Physics and Mathematics & Computer Science Divisions
  3. Argonne National Lab. (ANL), Argonne, IL (United States). High Energy Physics and Mathematics & Computer Science Divisions; Northwestern Univ., Evanston, IL (United States). Dept. of Electrical Engineering and Computer Science
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1542149
Grant/Contract Number:  
SC0008080; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2016; Journal Issue: 05; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English

Citation Formats

Sunayama, Tomomi, Padmanabhan, Nikhil, Heitmann, Katrin, Habib, Salman, and Rangel, Esteban. Efficient construction of mock catalogs for baryon acoustic oscillation surveys. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/05/051.
Sunayama, Tomomi, Padmanabhan, Nikhil, Heitmann, Katrin, Habib, Salman, & Rangel, Esteban. Efficient construction of mock catalogs for baryon acoustic oscillation surveys. United States. doi:10.1088/1475-7516/2016/05/051.
Sunayama, Tomomi, Padmanabhan, Nikhil, Heitmann, Katrin, Habib, Salman, and Rangel, Esteban. Sun . "Efficient construction of mock catalogs for baryon acoustic oscillation surveys". United States. doi:10.1088/1475-7516/2016/05/051. https://www.osti.gov/servlets/purl/1542149.
@article{osti_1542149,
title = {Efficient construction of mock catalogs for baryon acoustic oscillation surveys},
author = {Sunayama, Tomomi and Padmanabhan, Nikhil and Heitmann, Katrin and Habib, Salman and Rangel, Esteban},
abstractNote = {Precision measurements of the large scale structure of the Universe require large numbers of high fidelity mock catalogs to accurately assess, and account for, the presence of systematic effects. We introduce and test a scheme for generating mock catalogs rapidly using suitably derated N-body simulations. Our aim is to reproduce the large scale structure and the gross properties of dark matter halos with high accuracy, while sacrificing the details of the halo's internal structure. By adjusting global and local time-steps in an N-body code, we demonstrate that we recover halo masses to better than 0.5% and the power spectrum to better than 1% both in real and redshift space for k=1hMpc-1, while requiring a factor of 4 less CPU time. We also calibrate the redshift spacing of outputs required to generate simulated light cones. We find that outputs separated by Δ z=0.05 allow us to interpolate particle positions and velocities to reproduce the real and redshift space power spectra to better than 1% (out to k=1hMpc-1). We apply these ideas to generate a suite of simulations spanning a range of cosmologies, motivated by the Baryon Oscillation Spectroscopic Survey (BOSS) but broadly applicable to future large scale structure surveys including eBOSS and DESI. As an initial demonstration of the utility of such simulations, we calibrate the shift in the baryonic acoustic oscillation peak position as a function of galaxy bias with higher precision than has been possible so far. This paper also serves to document the simulations, which we make publicly available.},
doi = {10.1088/1475-7516/2016/05/051},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2016,
place = {United States},
year = {2016},
month = {5}
}

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